Precursor composites for oxygen dispersion hardened silver sheat

Details Precursor composites for oxygen dispersion hardened silver sheat Precursor composites for oxygen dispersion hardened silver sheat

1996-04-05

1999-06-22

Yamnitzky, Marie

Superconductor technology: apparatus, material, process

Precursor of high temperature superconductor material or...

505230, 505236, 505238, 505701, 505704, 428615, 428701, 428702, 428930, H01L 3924

Patent

active

059142979

ABSTRACT:
An oxide superconductor composite having improved texture and durability. The oxide superconductor composite includes an oxide superconductor phase substantially surrounded with/by a noble metal matrix, the noble metal matrix comprising a metal oxide in an amount effective to form metal oxide domains that increase hardness of the composite. The composite is characterized by a degree of texture at least 10% greater than a comparable oxide superconductor composite lacking metal oxide domains. An oxide superconducting composite may be prepared by oxidizing the precursor composite under conditions effective to form solute metal oxide domains within the silver matrix and to form a precursor oxide in the precursor alloy phase; subjecting the oxidized composite to a softening anneal under conditions effective to relieve stress within the noble metal phase; and converting the oxide precursor into an oxide superconductor.

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B. Ullman et al., "Phase Formation and Critical Currents in Bi (2223) Tapes", Advances in Superconductivity VII, Proceedings of the 7th International Symposium on Superconductivity (ISS '94), Nov. 8-11, 1994, pp. 753-756.

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